Here is where we are with the BT Flatty cylinders: Working on the tooling tweaks for the ports and are shorting for a Davenport release date. They will have valves, guides and spring pack as part of the cylinders. They will be avalible with stock intake nipples or WR intake nipples and the WR manifold will be avalible at that time also. The springs will take you to (.650") vs. stock .420".

If you're still doing the tooling, I strongly suggest that the deck height be shortened slightly. All factory engines are too loose regardless of gasket thickness, and most aftermarket pistons have smaller compression distances than the original.This is a major contributor to knocking - excessive quench clearance.Taking off roughly .030" will be safe in all cases IMHO, and be very helpful since tightening up this distance afterward is very complex and expensive.

Tappet guidesRoller cams with 10 different KR profilesHigh lift single valve springs with rates equivalent to the dual KR springsValve spring coversPeek a Boo timing coverThis spring I will have WR heads with KR style combustion chambersWR cylinders are on the drawing board